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28 March 2024
 
  » arxiv » astro-ph/0212392

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Extraction of cluster parameters with future Sunyaev-Zel'dovich observations
Nabila Aghanim ; Steen H. Hansen ; Sergio Pastor ; Dmitry V. Semikoz ;
Date 17 Dec 2002
Journal JCAP 0305 (2003) 007
Subject astro-ph hep-ph
AbstractThe Sunyaev-Zel’dovich (SZ) effect of galaxy clusters is characterized by three parameters: Compton parameter, electron temperature and cluster peculiar velocity. In the present study we consider the problem of extracting these parameters using multi-frequency SZ observations only. We show that there exists a parameter degeneracy which can be broken with an appropriate choice of frequencies. As a result we discuss the optimal choice of observing frequencies from a theoretical point of view. Finally, we analyze the systematic errors (of the order micro K) on the SZ measurement introduced by finite bandwidths, and suggest a possible method of reducing these errors.
Source arXiv, astro-ph/0212392
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